Q: What is the primary function of blood platelets?  

Answer: A

Blood platelets, also known as thrombocytes, are small, disc-shaped cells that are essential for blood clotting. When a blood vessel is damaged, platelets rush to the site of injury and stick to the damaged area, forming a plug to stop the bleeding. This process is called hemostasis and is crucial for preventing excessive blood loss. Platelets also release chemicals that attract other clotting factors to the site of injury, leading to the formation of a stable clot. Therefore, the primary function of platelets is to aid in the coagulation of blood.
While platelets play a role in the immune response by releasing chemicals that attract white blood cells to the site of infection or inflammation, they do not ingest bacteria. Additionally, platelets do not carry hemoglobin or transport CO2, which are functions performed by red blood cells.

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